JXHG-12/JXHG-24/JXHG-40.5

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JXHG-12/JXHG-24/JXHG-40.5

JXHG-12/JXHG-24/JXHG-40.5

JXHG series outgoing feeder unit for downstream load distribution and branch protection.

Quick Specifications

Rated Voltage

12kV / 24kV / 40.5kV

Function

Outgoing feeder

Protection

Relay protection ready

Application

Utility / Industrial

Product Overview

Our company can produce this product with a voltage class range of 1kV to 40.5kV and below. The fully enclosed and fully insulated gas-filled ring main unit is a metal common box type enclosed switchgear insulated by SF6 gas. This equipment can be composed of modules such as the load switch unit, the combined electrical appliance unit of load switch and fuse, the vacuum circuit breaker unit, and the busbar incoming line unit.

By adopting a series of excellent technologies and materials, it has excellent electrical and mechanical properties, is less affected by the environment and climate, is compact in size, easy to install, convenient to operate, maintenance-free, and has a flexible combination mode. The clear and intuitive design ensures simple and direct operation. It has a large feeder connection capacity and is suitable for a variety of wiring systems. Through this design, users can be provided with an integrated three-position load switch circuit breaker. Using a load switch instead of a disconnector is safer and more reliable. The fully enclosed design on the primary side provides protection against accidental contact, and the mechanical interlock live-line indicator that meets the five-prevention requirements can provide live-line indication for the incoming and outgoing lines.

Reliable operation: with a fully enclosed design, all switches and live busbar conductors are sealed in an air box welded by 3mm stainless steel plates; equipped with silicone rubber cable plugs to achieve full insulation and full sealing of the cable ends, thus not being affected by external environmental factors such as dust, humidity, and small animals. The spring energy storage operating mechanism can be operated manually or electrically. The simulated wiring diagram on the operation panel provides switch position indication. The cabinet body is made of galvanized steel plates and electrostatically sprayed on the surface to enhance corrosion resistance. The pressure gauge monitors the safe pressure range of SF6 gas in the box body. The main models of this product are JXHG-12, JXHG-24, and JXHG-40.5.

This product has the characteristics of being maintenance-free, highly reliable, with a service life of up to 20 years, having multiple incoming line methods, being able to achieve left, right, upper or front incoming lines, and multiple combination methods. Arbitrary combination can be achieved between each unit. Using insulated busbars, it can achieve front-to-back or left-to-right cabinet combination. The design scheme is flexible, the feeder outlet capacity is large, the floor space is small, and it is suitable for a variety of application requirements. It is mainly applicable to the power distribution networks of compact secondary substations, small industrial and mining enterprises, wind power plants, hotels, shopping malls, office buildings, commercial centers, and similar projects.

Enforce Standards

  • GB 1984-2003 High Voltage AC Circuit Breaker
  • GB 1985-2005 High Voltage AC Isolation Switch and Ground Switch
  • GB 3804-2004 3.6kV to 40.5kV High Voltage AC Load Switch
  • IEC 60265 High-Voltage Switches
  • GB 16926-2009 AC High Voltage Load Switch Fuse Combination
  • IEC 420 High-Voltage Alternating Current Switch-Fuse Combinations
  • GB 3906-2006 3.6kV to 40.5kV AC Metal Enclosed Switchgear and Control Equipment
  • IEC 62271 High-Voltage Switchgear and Controlgear
  • GB/T 11022-2011 Common Technical Requirements for High Voltage Switchgear and Control Equipment
  • IEC 60694 Common Specifications for High-Voltage Switchgear and Controlgear
  • GB/T 11023 High Pressure Switchgear - Sulfur Hexafluoride Gas Seal Test Method

Normal Service Condition

  • Maximum temperature: 40 degrees Celsius.
  • Minimum temperature: -40 degrees Celsius.
  • Maximum mean relative humidity: less than or equal to 95%.
  • Altitude: less than or equal to 2000 meters.

Performance Parameter

Cell Code and General Parameters

Cell Code Significance
CStandard single casing load switch unit
FLoad switch-fuse combined electrical unit
VCircuit breaker unit
DCable entry unit without switch
+Busbar side bushing
-Busbar top sleeve
SLParent unit
MMeasuring unit
PTPT cell
1K2(4)Load switch unit with double casing outlet
Performance Indication Normal Operating Environment Conditions
SF6 Gas Pressure The absolute pressure at 20C is 1.4bar Maximum Temperature 40C
Annual Leakage Rate of Gas 0.2% / year Minimum Temperature -40C
Class of Protection IP67 Maximum Mean Relative Humidity ≤95%
Air Chamber Stainless Steel Thickness 3.0mm Altitude ≤2000 meter
Bus Bar Meet the Criteria
Switchgear Inside the Bus 400mm²Cu GB/T11022, GB3906, GB1985
Switchgear Ground Bus 150mm²Cu GB16926, GB38041, GB1984
Colour GB3309
Switch Cabinet Front Panel RAL7012 IEC60056, IEC60129, IEC60265
Side Panel and Cable Room Front Cover Plate RAL7035 IEC60298, IEC60420, IEC60694

Module Performance Parameter

Item C Module F Module V Module V Module CB Module CB Module
Load Switch Combination Apparatus Vacuum Switch Isolation / Ground Switch Vacuum Circuit Breaker Isolation / Ground Switch
Rated Voltage kV121212121212
Rated Frequency Hz505050505050
Power Frequency Withstand Voltage (Phase / Port) kV42/4842/4842/4842/4842/4842/48
Lightning Impulse Withstand Voltage kV75/8575/8575/8575/8575/8575/85
Rated Current A630note6301250/630
Rated Closed-Loop Breaking Current A630
Rated Cable Charging Breaking Current A135/135
Rated Short Circuit Closing Current (Peak)5080
Rated Peak Withstand Current kA50
Rated Short-Time Withstand Current kA / 3s20
Rated Short Circuit Breaking Current kA31.5202525
Rated Transfer Current A1750
Fuse Maximum Current A-125
Loop Resistance Ω≤300≤600
Mechanical Life (second)500030005000200050005000

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